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Sealed oil tank liquid level transmitter

A liquid level transmitter and oil tank technology, applied in the field of sensor application, can solve the problems of not meeting the needs of oil fields, high cost, high price, and solve the problems of automatic monitoring and real-time measurement, low cost and wide measurement range. Effect

Inactive Publication Date: 2008-06-04
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these transmitters are all costly, and the price after they are manufactured is high, which cannot meet the needs of oil fields.

Method used

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  • Sealed oil tank liquid level transmitter
  • Sealed oil tank liquid level transmitter
  • Sealed oil tank liquid level transmitter

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0031]A liquid level transmitter for a sealed oil tank, comprising a sensor housing 1, a main splint 2, an air outlet plate 3, an auxiliary splint 4, a round hole 5 in the auxiliary splint, a vent pipe 6, a lead wire 9 on the sensor, a wire protection pipe 14, Flange 17. The sensor is fixed in the sensor housing 1, the lower end of the vent pipe 6 is fastened on the air outlet plate 3, and the upper end extends above the measurement liquid level, the lower end of the line protection tube 14 is connected to the sensor through the sealing joint 8, and the upper end is connected to the sensor through the flange joint 16. The flange 17 is connected, and the lead-out wire 9 on the sensor is drawn out through the wire protection tube 14 . The sensor is a differential pressure sensor. The pressure sensing surfaces on both sides of the differential pressure sensor respectively feel the air pressure above the measured liquid level and the pressure at the measured liquid level point in ...

Embodiment

[0032] Embodiment: Through the integration technology of signal processing circuits such as thick-film hybrid integrated circuit or flexible circuit board integration, the linear adjustment, zero point adjustment, full-scale adjustment, and temperature compensation adjustment circuits of the pressure-sensitive element are integrated on the pressure-sensitive element. Integral, so that the output of the sensor lead wire 9 is a standard current or voltage signal, realizing a long-distance transmission of the signal of the liquid level transmitter of the sealed oil tank.

[0033] The sensor housing 1 is a rectangular cavity structure, which is composed of the main splint 2 and the auxiliary splint 4. The outer hexagonal screw 18a is used as a positioning part to clamp and fix the sensor, and the sealing ring 7 is compacted and sealed, and the pressure on both sides of the sensor is exposed. surface to protect the sensor components and make the sensor feel differential pressure. T...

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Abstract

The invention discloses a sealed oil tank liquid level transducer which comprises a sensor and its lead wires, a vent pipe connected with the sensor and a flange. Wherein the sensor is a rectangular cavity, it includes a sensor outer shell, a master clamp and a slave clamp which connects to each other. Wherein the two pressure sensing surfaces on the two sides of the sensor senses air pressure above the detected liquid surface and pressure of liquid level detected sites in the liquid media; when pressure of detected media goes through the pressure sensing surfaces of the sensor high pressure and low pressure chamber separately, two sides' pressure sensing surfaces generate different offsets which is in proportion to the pressure difference, the lead wires of the sensor output the measured pressure signal to realize long distance transmission of the sealed oil tank liquid level transducer signal.

Description

[0001] Field of the Invention The present invention relates to the application field of sensors, in particular to a sealed oil tank liquid level transmitter for detecting liquid level changes in containers and liquid level measurement and transmission in petroleum and other industries. Background technique [0002] The liquid level of the sealed oil storage tank is an important parameter in the crude oil production process. Accurate monitoring of the liquid level is of great significance to the automation and safe production of the oil field production process. In the process of oil exploitation, storage, transportation and refining, oil often needs to be stored in heated sealed oil tanks. If the liquid level is out of control, the bottom of the oil tank will crack and crude oil will overflow, causing major production accidents and environmental pollution problems. Poor liquid level control will cause Economic losses and economic disputes. Since there are three substances in t...

Claims

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Application Information

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IPC IPC(8): G01F23/14
Inventor 李民强孙怡宁耿立辉唐力强
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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